21241690

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{103}}^1\times {\mathrm{503}}^1$

素因数の和:654

約数の個数: 32

約数和(自身を含む): 39626496

約数和(自身を除く): 18384806

約数列:

[1, 2, 5, 10, 41, 82, 103, 205, 206, 410, 503, 515, 1006, 1030, 2515, 4223, 5030, 8446, 20623, 21115, 41246, 42230, 51809, 103115, 103618, 206230, 259045, 518090, 2124169, 4248338, 10620845, 21241690]

約数ペア:

[(1, 21241690), (2, 10620845), (5, 4248338), (10, 2124169), (41, 518090), (82, 259045), (103, 206230), (205, 103618), (206, 103115), (410, 51809), (503, 42230), (515, 41246), (1006, 21115), (1030, 20623), (2515, 8446), (4223, 5030)]